Coal-jig



(No Model.)

G. O. STROH.

GOAL JIG.

No. 486,907. Patented N0v. 29, 1892.

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UNITED STATES PATENT OFFICE.

CHARLES ORION STROH, OF FREELAND, PENNSYLVANIA.

COAL-JIG.

SPECIFICATION forming part of Letters Patent No. 486,907, dated November29, 1892.

Apvlication filed April 11. 1892.

To all whom, it may concern:

Be it known that I, CHARLES ORION STRoH,

a citizen of the United States, residing at Freeland,Luzerne county,Pennsylvania, have invented a new and useful Coal-Jig for Cleaning theCoal from Slate and Dirt, of which the following is a specification.

My invention relates to improvements in machines for separating coalfrom the slate and dirt in which a vertically-reciprocating perforatedpiston slightly inclining toward slate-pocket, operates in a wall orring fixed stationary in a tank filled with water; and the objects of myimprovements are, first, to provide a machine that requires less powerto operate and that will make stronger water-jets for keeping the coallivelier in a suspended motion,and thus allow the slate, &c., to sinkquicker to the piston; second, to make a better separation with lessexpense; third, to reduce friction and provide against breakage. Iattain these objects by the mechanism illustrated in the drawings, inwhich Figure 1 is a vertical section of the machine on line m 41;, Fig.2. Fig. 2 is a top view, and Fig. 3 a side view, of the double-jointedhanger operating the piston.

Similar letters refer to similar parts throughout the several views.

The wall or ringA and piston B are separate and distinct parts, incombination forming the receptacle for holding the material to beseparated. The wall or ring A is secured to the wooden tank and madestationary by bolts 0 c c at the proper place inside of tank. The pistonB is suspended in an inclined position in the ring A at or near thelower edge, as shown in Fig. 1. This piston is provided with an annulardepression D (channel) half an inch deep and about eight inches wide,forming a slate bottom, where it will more hastily reach theslate-pocket E to be dis- Serial No. 228,728. (No model.)

charged. The piston B is a trifle less in diameter than the inside ofring or Wall A, so that it will-work free in itsvertically-reciprocating movement. At the same time the water willsquirt up all around between the piston B and wall or ring A, keepingthe coal loose and preventing the slate from crowding up the wall orring A. The piston B has also grooves E, running from center towardannular depression D, (channeL) The stem or shaft F, which holds thepiston has a double-jointed hanger G at the upper end connecting thepiston to the crank on horizontal shaft. This hanger is composed of twolinks slipped on trunnions that are cast on the crank-box H and on theblock fastened to the shaft, as shown and described. This hanger willcause the crank-box to turn up if the piston should get fast and preventits breaking.

In coal-jigs invented prior to my within-described invention thereceptacle is made in one part and the entire receptacle has thevertically-reciprocating motion; but in my invention the receptacle iscomposed of two distinct loose and separate parts, (the wall andpiston,) and in my invention the piston alone has the said motion. Hencethis advantage can readily be seen. Therefore,

What I claim as my invention, and desire to secure by Letters Patent,is-

The combination of the tank, the stationary box with annular wall withinsaid tank, the inclined perforated bottom or piston operating inside ofsaid wall and having an annular circumferential depression communieatingwith a slate-pocket, and means, substantially as described, forreciprocating said piston up and down.

CHAS. ORION STROH.

Witnesses:

JOSEPH R031, L. L. JOHNSON.

